Algebra Ch 5 Review Functions

• positive correlation
• negative correlation
• no correlation

• positive correlation
• negative correlation
• no correlation

• 41/1 ; Your car travels 41 miles every 1 hour.
• 10; Your car travels for 10 hours. 
• 1/41 ; Your car travels 41 miles every 1 hour.
• 164; Your car travels 164 miles. 

• y = 290x−1.9 
• y=−1.9+271 
• y = 10x+271 
• y=−1.9x+290 

y=2 

• is a vertical line
• is a horizontal line
• is a diagonal line

x=-2

• is a vertical line
• is a horizontal line
• is a diagonal line

• positive correlation
• negative correlation
• no correlation

• The slope is negative.
• The slope is positive.

Does the equation represent a direct variation? If so, find the constant of variation.
2x = −5y

• yes; k=2/5 
• no
• yes; k=−5/2 
• yes; k=−2/5 

Does the equation represent a direct variation? If so, find the constant of variation.
2x − 5y = 0 

• no
• yes; k = -2/5
• yes; k = -5
• yes; k = 2/5